Someone is ringing the doorbell. Go and see .
| A．who it is | B．who is it | C．who is he | D．who he is |
相关试题
In this experiment, the famous professor showed three different____ to the study of physics．
| A．means | B．methods | C．ways | D．approaches |
_______the match is lost? We can fight again!
| A．Even though | B．What though | C．If though | D．As though |
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
| A．would have been unthinkable | B．would not be unthinkable |
C．would be unthink able |
D．would not have been unthinkable |
I made a fire ____up the room as soon as my father came in．
| A．warm | B．warmed | C．to warm | D．warming |
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